High-Performance 3.3V 2.5GHz LVTTL/LVCMOS to CML Clock Fanout Buffer (1:10) - SY89831UMG-TR

In the realm of high-speed digital systems, the distribution of pristine clock signals is a fundamental challenge. As data rates push into the multi-gigabit range, the integrity of the clock becomes paramount. The SY89831UMG-TR from Microchip Technology stands as a critical solution, engineered to address the demanding requirements of modern networking, telecommunications, and computing applications. This device is a high-performance, 3.3V 2.5GHz clock fanout buffer designed to convert low-voltage single-ended clock inputs into ten high-speed differential CML outputs.

The primary function of the SY89831UMG is to translate LVTTL or LVCMOS input signals into CML logic levels. This is a crucial capability, as many systems utilize low-voltage single-ended clocks from sources like crystal oscillators or FPGAs, but require the superior noise immunity and fast edge rates of differential Current Mode Logic (CML) for driving downstream components like serializers/deserializers (SerDes), ASICs, or optical modules. The device accepts a very wide input frequency range from DC to 2.5GHz, making it exceptionally versatile for both low-speed control and high-speed data clocking.

A key feature of this buffer is its exceptional signal integrity. It boasts low additive phase jitter, which is critical for maintaining the overall timing budget of a system. High jitter can lead to increased bit error rates (BER), and the SY89831UMG's design minimizes this degradation, ensuring the clock signals arriving at each destination are clean and stable. Furthermore, the ten outputs exhibit minimal output-to-output skew, guaranteeing that all distributed clock edges are aligned within a very tight window, essential for synchronous operations across large PCBs.

The device operates from a single 3.3V power supply and is offered in a compact, space-saving 32-pin MLF® (QFN) 5x5mm package, making it suitable for high-density board designs. Its robust performance and high integration make it an ideal choice for replacing multiple discrete components with a single, reliable IC, thereby simplifying design and improving system reliability.

ICGOOFind: The SY89831UMG-TR is an indispensable component for architects of high-speed systems, offering a seamless interface between single-ended clock sources and the differential world of gigabit communications. Its combination of 2.5GHz bandwidth, 10-output fanout, and superior jitter performance establishes it as a benchmark in clock management technology.

Keywords: Clock Fanout Buffer, CML Output, Phase Jitter, 2.5GHz, Signal Integrity